Tubular magazine firearm



June 4, 1940. c. G. SWE BILIUS TUBULAR MAGAZINE FIREARM Filed July 30, 1938 2 Sheets-Sheet 1 a, 3 E m a m m & g w 7////////// g w////////, 45 2? QM a V, h 6% m: Q. s M w vib N WNN June 1940. c. G. SWEBILIUS 2,203,035

TUBULAR MAGAZINE FIREARM Filed July 50, 1938 2 Sheets-Sheet 2 ruauma MAGAZINE FIREARM Application July 30, 19 38, Serial No. 222,099

8Claims.

This invention relates to an improvement in tubular magazine firearms, and more particularly to means for securing the tubular magazines of such firearms in place.

a One of the main objects of the present invention is to provide a superior tubular magazine construction wherein simple, reliable and effective means is provided for adjustably securing the tubular magazine and stock-unit together.

A further object of the present invention is to provide superior means for adjustably securing together the tubular magazines and stock-units of firearms, which will permit adjustment of the magazine with respect to a magazine-throat or the like, incorporated in the receiver or frame of the firearm.

Another object of the present invention is to provide superior adjustable means for securing the magazines and stock-units of firearms together, characterized by ease of assembly and low cost of manufacture.

A still further object of the present invention is to provide superior magazine-retaining means for adjustably securing the tubular magazine in as place in the stock-unit of firearms of such character as will not cause the cracking or splitting of the said stock-unit.

With the above and other objects in view, as will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out the present invention 35 are shown for illustrative purposes:

Fig. 1 is a view in side elevation of a firearm embodying the present invention;

Fig. 2 is a broken view, partly in side elevation and partly in vertical, central longitudinal section, of the firearm shown in Fig. 1;

Fig. 3 is a longitudinal sectional view taken on the line 8-3 of Fig. 2;

Fig. 4 is a transverse sectional view taken on the line H of Fig. 2;

45 Fig. 5 is a similar view taken on the line 55 of Fig. 2;

Fig. 6 is a perspective view of the magazineretaining member; and

Fig. 7 is a similar view of the annular clamp- 150 ing-nut.

The particular firearm herein chosen for illustration of the present invention includes a stockunit generally designated by the reference character l and having a butt-stock portion ii and Is an integral fore-stock-portion l2 upon the upper face of which latter is mounted, in any suitable manner, a barrel-unit generally designated by the reference character it and including a tubular receiver or frame It and a barrel proper l5, either formed integrally with each other or rigidly connected together so as to form a unit.

The particular character of the mechanism contained within the receiver or frame it forms no essential feature of the present invention, but, as shown in Fig. 2 of the drawings, the receiver l0 l4 accommodates a reciprocating breech-bolt l6 visible through a longitudinal bolt-handle passage formed in the side-wall of the receiver l4 and also through an ejection-opening l8 formed in the side-wall of the said receiver. The 16 said breech-bolt i6 is provided with a bolt-operating handle is which extends outwardly through the passage I! just referred to.

The receiver M is provided with a bar-like lug 20 extending substantially the full length of go the said receiver and depending from the lower face thereof for the purpose of containing part of the working mechanism (not shown) of the firearm and a magazine-throat 2i or the like. The magazine-throat, just above referred to, is adapted to guide cartridges fed from the magazine, to a position where they may be easily inserted into the firing-chamber of the firearm by the forward movement of the breech-bolt I 6.

The barrel-unit l8, comprising the receiver or frame It and the barrel Iii together with the lug 20 depending from the said receiver, is located in a longitudinal groove 22 formed in the upper face of the stock-unit Hi. The butt-stock portion i i is provided with a magazine-receiving passage 23 which at its inner or forward end intersects the longitudinal groove 22 in axial alignment with the magazine-throat 2| and which at its outer or rear end is provided with an enlarged portion 24 opening rearwardly into a finger-clearance recess 25. The recess 25, just referred to, registers with an aperture 26 formed in a butt-plate 21 which is secured to the buttstock portion II by means of screws 28.

The magazine-receiving passage 23 is adapted to receive with a free fit, a tubular magazine generally designated by the reference character 29 and which is in axial alignment with the magazine-throat 2 I, above referred to. The said magazine includes a tubular housing-member 30 and a tubular cartridge-receiving member 3i normally located within the said housing-member 30 but retractable rearwardly therefrom. The tubular magazine 29 has its inner or forward end 29:: located closely adjacent the magazinethroat 2| in the receiver-lug 29 in axial alignment therewith, and has its outer or rear end 29!) extending into the enlarged portion 24 of the passage 23. Near its inner end, the magazine 29 passes through an annular ring 32 forming part of a trigger 33 which is pivoted as at 34 in a vertical passage 35 extending upwardly from the under face of the stock-unit l0 and intersecting the groove 22, the said passage being intersected intermediate its ends by the magazine-receiving passage 23 before referred to.

Housed within the cartridge-receiving member 3| is a follower-spring 36 which bears at its inner or. forward end against a cartridge-follower 31 which latter, under the urge of the said follower-spring, constantly forwardly urges the cartridges 38 contained within the said cartridge-receiving member. At its outer or rear end the follower-spring 36 seats against the inner face of a shank 39 formed on a magazine-head 40 rigidly secured to the outer or rear end of the cartridge-receiving member 3|.

The magazine-head, just above referred to, projects outwardly into the finger-clearance recess 25 where it is readily accessible for being grasped by the fingers of the user of the firearm for retracting and advancing the cartridgereceiving member 3|. The said magazine-head is secured to the said cartridge-receiving member 3| by means of a transverse pin 4|. The trans verse pin 4|, as particularly well shown in Fig. 4 of the drawings, passes transversely through the side-walls of the cartridge-receiving member 3| and through the shank 39 of the magazine-head 46 extending into the rear end of the said member 3|. One end 42 of the pin 4| extends out beyond the periphery of the said cartridge-receiving member and engages with a bayonet-slot 43 provided in the outer end of the housing-member 30 for releasably coupling the said housing-member and cartridge-receiving member together in a mannerwhich permits the ready retraction or removal of the said cartridge-receiving member from the housing-member 39. The coaction of a bayonet-slot with a pin carried by the cartridge-receiving member securely locks the said cartridge-receiving member in place against accidental retraction but with capacity for ready release by a turning movement by the user.

Provided in the wall of the housing-member 30 is a charging-aperture 44 which registers with a charging-passage 45 opening through one side of the butt-stock portion The charging-aperture 44 and the charging-passage 45 permit the passage of cartridges into the magazine for charging the same when the cartridge-receiving member 3| is retracted from the housing-member 30 sufficiently far to bring its forward end into a position rearwardly of the charging-aperture 44. After the magazine has been charged with cartridges, the cartridge-receiving member 3| is moved forwardly into the housing-member 39 sufliciently to permit the end 42 of the pin 4| of the said cartridge-receiving member to enter the open rear end of the bayonet-slot 43 and to be turned laterally into the cross-reach of the said slot for locking the cartridge-receiving member in place, as is customary in tubular magazines.

As shown particularly well in Fig. 3 of the drawings a tubular magazine-retaining member 46 is threaded into the enlarged portion 24 of the magazine-receiving passage 23 by means of buttress type threads 41 formed on its outer periphery and serving to out similar though shallower threads in the adjacent wall of the said portion 24. The said member 46 has an axial passage 48 through which the tubular magazine 29 extends with capacity for axial adjustment with respect thereto. The magazine-retaining member 46 is provided at its outer end with a reduced forwardly and outwardly tapering threaded shank 49 through which diametrically-oppositelylocated slots 5059 extend, as is particularly well shown in Figs. 3 and 6 of the drawings;

The slots 5050, just above referred to, extend longitudinally through the shank 49 sufilciently into the body of the magazine-retaining member 46 to form two semi-annular resilient clampingfingers. 5 |5 which are adapted to be compressed onto the housing-member 30 of the tubular magazine 29 for the purpose as will hereinafter appear.

' An annular clamping-nut 52 having an external diameter sufiiciently small to freely fit into the enlarged portion 24 .of the magazine-receiving passage 23, is threaded "onto the reduced shank 49 of the magazine-retaining member 46. The internally-threaded bore 53 of the said clamping-nut 52 is tapered to coact with the taper-threads on the shank 49 of the magazineretaining member 46. The annular clampingnut 52 is also provided with diametrically-oppositely-located notches 54--54 so as to enable the said clamping-nut to be turned on the reduced shank 49, above referred to, by means of a suitable tool. Turning the clamping-nut onto the shank 49 serves 'to compress the clamping-fingers 5|-5| onto the housing-member 30 of the tubular magazine 29 which passes through the magazine-retaining member 46.

By means of the buttress-threads formed on the magazine-retaining member 46, a very strong and rigid connection is secured between the said retaining-member and the butt-stock of the firearm. The use of buttress-threads on the said retaining-member also eliminates the necessity of providing an intermediate member between the retaining-member 46 and the butt-stock of the firearm, as the buttress-threads-adapt them selves readily to being threaded directly into the said butt-stock without causing the latter to crack or split.

As the reduced shank 49 of the magazine-retaining member 46 is slightly conical in longitudinal section, as is the bore 53 of the annular clamping-nut 52 'coacting therewith, the tighter the saidclamping-nut is threaded thereon, the greater the compression exerted by the clampingfingers 5|-5| on the housing-member 30.

From the foregoing, it will be readily seen that the tubular magazine may be longitudinally adjusted with respect to the magazine-throat or the like to compensate for any variations that might exist between the receiver or frame and the stockunit of the firearm. By this mode of mounting the housing-member 3|), it is possible to carefully and properly adjust the forward end of the said housing-member with respect to the magazinethroat or the like, and then after this adjustment is effected, to firmly lock the said member in place by means of the clamping-nut 52 which is threaded onto the shank 49 of the retaining-member 46.

It will also be apparent that the housing-member 3|) may, if desired for any reason, be removed from the magazine-receiving passage 23in the butt-stock portion of the firearm by backing-off the clamping-nut 52. sufliciently from the shank of the retaining-member 46 to free the said housing-member from the compression exerted by the clamping-fingers 5I-5l of the said retainingmember, thereby permitting the withdrawal of the housing-member 30 and the parts organized. therewith, from the passage 23 in the butt-stock.

The free fitting of the housing-member 30 with respect to the passage formed in the butt-stock permits longitudinal movement of the said housing-member to any degree that may be desired, permitting the said housing-member to be adjusted with great accuracy with respect to the magazine-throat or the like. The process of assembly and adjustment is greatly facilitated by the ease with which the housing-member 30 may be secured in the magazine receiving passage 23 with consequent decrease in the necessary time for assembly and adjustment.

The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

1. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; a tubular magazine-retaining member secured in the magazine-receiving passage in the said stock; and a tubular magazine adjustable axially in the magazine-receiving passage in the said stock and through the said tubular magazine-retaining member; the said magazine-retaining member being provided with releasable magazine-engaging means, releasable from said magazine for axial adjustment of the latter and operable to engage about and rigidly clamp the said tubular magazine to retain the same in any axially-adjusted position thereof.

2. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; a tubular magazine-retaining member secured in the magazine-receiving passage in the said stock and provided at its rear end with a plurality of rearwardly-extending clamping-fingers; a tubular magazine located in the magazine-receiving passage in the said stock and extending through the said tubular magazine-retaining member therein; and clamping-means forcing the clamping-fingers at the rear of the said tubular magazine-retaining member against the exterior surface of the said tubular magazine to retain the same in axially-adjusted position.

3. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; a tubular magazine-retaining member secured in the magazine-receiving passage in the said stock and provided with a plurality of rearwardly-projecting externally-threaded clamping-fingers; a tubular magazine located in the magazine-receiving passage in the said stock and extending through the said tubular magazine-retaining member therein; and a clamping-nut encircling the said tubular magazine and threaded onto the exteriorly-threaded clamping-fingers of the said magazine-retaining member and forcing the said clamping-fingers into firm engagement with the exterior surface of the said tubular magazine to retain the latter in axially-adjustable position.

4. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end: an externally-threaded tubular magazine-retaining member in threaded engagement with the wall of the magazine-receiving passage in the said stock and provided with a plurality of externallythreaded rearwardly-projecting clamping-fingers; a tubular magazine located in the magazine-receiving passage in the said stock and extending through the said externally-threaded tubular magazine-retaining member; and clamping-means forcing the clamping-fingers of the said magazine-retaining member against the exterior surface of the said tubular magazine to retain the same in axially-adjusted position.

5. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; an externally-threaded"tubular magazine-retaining member in threaded engagement with the wall of the magazine-receiving passage in the said stock and having a plurality of rearwardly-extending externally-threaded clamping-fingers; a tubular magazine located in the magazine-receiving passage in the said stock and extending through the said tubular externally-threaded magazine-retaining member between the externally-threaded clamping-fingers thereof; and a clamping-nut encircling the said tubular magazine andhaving threaded engagement with the externally-threaded clamping-fingers of the said magazine-retaining member to force the said clamping-fingers into firm engagement with the exterior surface of the said tubular magazine to retain the same in axial adjustment.

6. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; a tubular-magazine retaining-member secured in the magazine-receiving passage in the said stock; a tubular magazine freely movable in the magazine-receiving passage in the said stock and adjustable through the said tubular-magazine retaining-member; a clamping-finger carried by said magazine-retaining member and movable into and out of clamping engagement with said tubular magazine; and a clamping-finger actuating-nut encircling the said tubular magazine and having threaded connection with the said magazine-retaining member for moving said clampingfinger into and out of clamping engagement with the said tubular magazine to retain the latter in axial adjustment.

'7. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end; an externally-threaded tubular-magazine retaining-member in threaded engagement with the wall of the magazine-receiving passage in the said stock; a tubular magazine axially adjustable in the magazine-receiving passage in the said stock and through the said externally-threaded tubular-magazine retaining-member; the said externally-threaded magazine-retaining member being provided with a magazine-clamping finger movable into and out of clamping-engagement with the said tubular magazine; and finger-actuating means movably connected to the magazineretaining member for moving the clamping-finger into position to retain the tubular magazine in axially adjusted position.

8. A tubular-magazine firearm including in combination: a stock provided with a magazinereceiving passage opening through its rear end: an externally-threaded tubular-magazine retaining-member in threaded engagement with the encircling the said tubular magazine and having threaded connection with the said externallythreaded magazine-retaining member to force the said fingers into clamping engagement with the said tubular magazine to retain the same in axial I adjustment.

CARL G. SWEBILIUS. 

